JPH0347755Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to an electrode roller shaping cutter (hereinafter referred to as a cutter) that is attached to an electrode roller shaping device for shaping the electrode roller of a roll spot welding machine, and particularly relates to an electrode roller shaping cutter (hereinafter referred to as a cutter) that is attached to an electrode roller shaping device for shaping the electrode roller of a roll spot welding machine. This invention relates to a cutter for shaping a pair of electrode rollers of a portable roll spot welding machine which is attached to a robot arm and moves to a desired position by a robot arm to perform roll spot welding.

(Prior Art) An electrode roller shaping device cuts and shapes an electrode roller attached to a roll spot welding machine.

An example of such an electrode roller shaping device is disclosed in Japanese Utility Model Publication No. 60-25341. In this electrode roller shaping device, the electrode roller shaping device is attached to the body of a fixed roll spot welding machine, and a pair of electrode rollers installed in the body of the roll spot welding machine sandwich the workpiece and roll it. When performing spot welding, the cutter blade of the electrode roller shaping device is pressed against the outer periphery of the pair of electrode rollers, and the rotation of the pair of electrode rollers is used to shape the outer periphery of the electrode roller. . The cutter of this electrode roller shaping device is fixed to the tip of a long cutter holder.

(Problem that the invention attempts to solve) However, when attached to a robot arm,
In the case of a portable roll spot welding machine that performs roll spot welding of the workpiece by being moved to a desired position by the guidance of a robot arm, the main body of the roll spot welding machine is sequentially moved by the robot arm. Since the roller spot welding machine is manufactured to be lightweight and compact, it is difficult to attach an electrode roller shaping device to the main body of the roll spot welding machine as in the past.

Similarly, there was also the problem that the cutter fixed to the tip of the long blade holder for this electrode roller shaping device could not be attached to the main body of the portable roll spot welding machine. In view of this, the present applicant has devised an electrode roller shaping device that can shape the electrode roller of a portable roll spot welding machine, which is attached to a robot arm and moved to a desired position. An application has been filed for utility model registration (Utility Model Application No. 1-7237).

The object of the present invention is to provide a cutter that can be applied to this electrode roller shaping device.

(Means for Solving the Problem) As a means for achieving the above object, in a cutter attached to an electrode roller shaping device for shaping a pair of electrode rollers of a roll spot welding machine, the cutter body of the cutter is formed of a circular member. A cutting groove is provided along the circumferential direction on the outer periphery of the circular cutter main body, a cutting groove is provided on the side wall of the cutting groove for shaping the side surface of the tip end of the pair of electrode rollers, and a cutting groove is provided on the bottom surface of the cutting groove. The structure is such that a blade portion is provided to shape the top of the tip of the electrode roller.

(Function) When shaping a pair of electrode rollers using the cutter attached to the electrode roller shaping device configured as described above, the cutter of the rotated electrode roller shaping device is held between the pair of electrode rollers. Ba,
It can be shaped. The pair of electrode rollers is driven to rotate by the rotation of the cutter, and is shaped by this rotation. That is, the pair of electrode rollers are cut and shaped by the cutting blade provided on the side wall of the cutting groove of the cutter. Then, when the pair of electrode rollers are tightly sandwiched and come close to each other, the tops of the tips of the pair of electrode rollers reach the bottom of the cutting groove, and are cut and shaped by the cutting blade provided on the bottom of the cutting groove. be done.

(Embodiment) Next, an embodiment of the present invention will be described based on FIGS. 1 to 3. 1 is a cutter body, and 2 is a mounting hole bored in the axis of the cutter body 1. Reference numeral 3 denotes a positioning groove formed in the mounting surface 4 of the cutter body 1. Therefore, the cutter body 1 can be attached to the electrode roller shaping device 9, which will be described later, by fitting the positioning groove 3 of the cutter body 1 into a predetermined position of the electrode roller shaping device 9 and tightening with nuts 6a, 7a. Two cutter bodies 1 are attached to the electrode roller shaping device 9, thereby forming a pair of cutters 1A and 1B.

Reference numeral 5 denotes a cutting groove provided along the outer periphery of the cutter body 1, and the width of the cutting groove 5 is determined by a pair of electrode rollers 4 attached to a roll spot welding machine 45, which will be described later.
6, or slightly sandwiched (see FIG. 5).

Reference numerals 6 and 7 designate cutting blades as blade portions formed at right angles to the side walls of the cutting groove 5, and these cutting blades 6 and 7 shape the side surfaces of the tip portions of the pair of electrode rollers 46. Reference numeral 8 denotes a long cutting blade as a blade portion which is bored on the bottom surface of the cutting groove 5 so as to be inclined with respect to the side wall of the cutting groove 5, and this cutting blade 8 is used to shape the top of the tip of the electrode roller. It is.

Here, the electrode roller shaping device to which this cutter body 1 is attached will be explained with reference to FIGS. 4 and 5. 9 is an electrode roller shaping device, 10 is a base of the electrode roller shaping device 9, and 11 is a substrate fixed to the base 10. 12 is a swinging mechanism that swings in the vertical direction (in FIG. 4, the direction perpendicular to the plane of the paper, that is, the front-rear direction of the electrode roller shaping device 9), and 13 is a swinging mechanism that swings in the horizontal direction (in the left-right direction of the paper in FIG. 4). It is a swinging mechanism that swings. This vertical swing mechanism 1
2 and the horizontal swing mechanism 13 are the same mechanism,
The only difference is the direction of rocking.

Reference numeral 14 denotes a pair of guide rails fixed to the substrate 11 in the vertical direction. Bearings 15 and 16 are slidably fitted to the pair of guide rails 14, and a substrate 17 is fixed to these bearings 15 and 16. Reference numeral 18 denotes a fixed spring clamp that is located between the pair of guide rails 14 and is fixed to approximately the center of the board 17. 19 is a fixed spring retainer 18
This is a spring holder that is disposed facing both sides of the electrode roller shaping device 9 in the vertical direction with the electrode roller shaping device 9 at the center, and is fixed to the substrate 11.

Fixed spring catch 18 and spring holder 1
A spring (not shown) is interposed between it and 9, and is always resiliently biased toward the center. 2
Reference numeral 0 designates an adjustment bolt that is screwed into the spring holder 19 and adjusts the elastic force of a spring (not shown), and 21 is a lock nut that is screwed into the adjustment bolt 20.

Therefore, the substrate 17 is supported by the substrate 11 so as to be swingable in the vertical direction.

Reference numeral 22 denotes a pair of guide rails fixed to the substrate 17 in the lateral direction (in a direction orthogonal to the pair of guide rails 14); 23 and 24 denote bearings slidably fitted to the pair of guide rails 22; A substrate 25 is fixed to 24. Reference numeral 26 denotes a fixed spring clamp that is located between the pair of guide rails 22 and is fixed to approximately the center of the board 25.
Reference numeral 2 designates spring holders that are disposed opposite to both sides of the electrode roller shaping device 9 in the lateral direction with the fixed spring retainer 26 as the center, and are fixed to the substrate 17.

Fixed spring catch 26 and spring holder 2
A spring (not shown) is interposed between it and 7, and is always resiliently biased toward the center. 2
Reference numeral 8 denotes an adjustment bolt that is screwed into the spring holder 27 and adjusts the elastic force of a spring (not shown), and 29 is a lock nut that is screwed into the adjustment bolt 28.

Therefore, the substrate 25 is supported by the substrate 17 so as to be slidable laterally.

30 is a bracket fixed to the board 25; 31 is a bracket fixed to the board 25;
is a bearing case fixed to the top of this bracket 30. Reference numeral 32 denotes a drive shaft rotatably supported by a bearing 33 housed in a bearing case 31, and gears 34 and 35 are mounted on the rear protrusion of this drive shaft 32.

Reference numerals 36 and 37 denote rotary shafts rotatably supported by bearings 38 and 39 housed in a bearing case 31, and a large-diameter gear 40 that meshes with the gear 34 is attached to the rear protrusion of the rotary shaft 36. In addition, a gear 34 is provided on the rear protrusion of the rotating shaft 37.
A small diameter gear 41 that meshes with is attached. Therefore, when the drive shaft 32 rotates, the rotation shafts 36 and 37 rotate simultaneously, and the rotation shaft 37 rotates faster than the rotation shaft 36 (see FIG. 7).

42 is a motor bracket fixed to the rear part of the bracket 30, 43 is a drive motor attached to the motor bracket 42, and a gear 44 that meshes with the gear 35 is attached to a rotating shaft 43a of the drive motor 43. 45 is a roll spot welding machine attached to the robot arm, and 46 is a pair of electrode rollers rotatably supported by the roll spot welding machine 45.

Next, the effect will be explained. A pair of cutters 1A, 1B
is attached to the electrode roller shaping device 9, and the drive motor 4 is connected to the electrode roller shaping device 9.
3, the drive shaft 43 of the drive motor 43
a rotates, the rotation is transmitted from gear 44 to gear 35, and drive shaft 32 rotates. This rotation of the drive shaft 32 causes the gear 34 to rotate. gear 3
4 meshes with two gears with different gear ratios, namely a large diameter gear 40 and a small diameter gear 41.
The large diameter gear 40 rotates at low speed, and the small diameter gear 41
rotates at high speed.

The rotating shaft 36 is rotated by the low speed rotation of the large diameter gear 40.
The cutter 1A attached to the tip of the rotating shaft 36 also rotates at a low speed. Further, due to the high speed rotation of the small diameter gear 41, the rotating shaft 37 and the cutter 1B attached to the tip of the rotating shaft 37 also rotate at high speed. That is, when the drive motor 43 operates, the pair of cutters 1A and 1B rotate in the same direction, with one cutter 1A rotating at a low speed and the other cutter 1B rotating at a high speed.

When the pair of cutters 1A and 1B rotate in this manner, the roll spot welding machine 45 attached to the robot arm (not shown) moves to the vicinity of the electrode roller shaping device 9, and the pair of cutters 1
A and 1B are held between a pair of electrode rollers 46. (See Figures 5 and 8).

A pair of electrode rollers 46 are connected to a pair of cutters 1A, 1
When holding B, if the positions of the pair of electrode rollers 46 are shifted in the vertical direction, the pair of electrode rollers 46
When the pair of cutters 1A and 1B come into contact with each other, a vertical force acts, and the pair of cutters 1A and 1B move in the vertical direction by the vertical swing mechanism 12, and the pair of electrode rollers 46 move the pair of cutters 1A and 1A. , 1B correctly and evenly.

Similarly, when the positions of the pair of electrode rollers 46 are shifted in the lateral direction, when the pair of electrode rollers 46 come into contact with the pair of cutters 1A, 1B, a lateral force acts, and the lateral swing mechanism 13 A pair of cutlets 1
A, 1B move laterally, and a pair of electrode rollers 4
6 correctly and evenly abuts the pair of cutters 1A and 1B.

In this way, when the pair of electrode rollers 46 comes into contact with the pair of cutters 1A, 1B, the pressure of the roll spot welding machine 45 causes the pair of electrode rollers 4
6 tries to approach the pair of cutters 1A and 1B with a predetermined pressure, so that burrs and the like attached to the sides of the tips of the pair of electrode rollers 46 are formed on the side walls of the cutting groove 5 of the cutter body 1. Cutting blades 6, 7
The side surfaces of the tip ends of the pair of electrode rollers 46 are shaped.

Furthermore, the pair of electrode rollers 46 move toward each other due to the pressure of the roll spot welding machine 45, so that the tops of the tips of the pair of electrode rollers 46 reach the bottom of the cut groove 5, It is cut and shaped by a long cutting blade 8 provided on the bottom surface. In this way, the pair of electrode rollers 4
When the shaping of the tip of the cutter 6 is completed, the roll spot welding machine 45 releases the pair of electrode rollers 46 and releases the pair of cutters 1A and 1B from being held.

After the clamping is released, the operation of the drive motor 43 is stopped, and the rotation of the pair of cutters 1A and 1B is stopped. Then, the roll spot welding machine 45 is returned to its current position by the robot arm, and preparations are made for the next roll spot welding.

Hereinafter, the second embodiment, the third embodiment, and the fourth embodiment of the present invention will be described.
An example will be explained. Note that the same components as in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed explanation thereof will be omitted.

First, a second embodiment will be explained using FIGS. 9 and 10. The feature of this embodiment is that an elongated cutting blade 47 that is approximately perpendicular to the side wall of the cutting groove 5 is bored in the bottom surface of the cutting groove 5 provided on the outer periphery of the cutter body 1. This cutting blade 47
is for shaping the top of the tip of the electrode roller 46. Since the operation is almost the same as that of the first embodiment, the explanation will be omitted.

Next, a third embodiment of the present invention will be described using FIG. 11 and FIG. 12. A feature of this embodiment is that a circular cutting blade 48 is provided at the bottom of the cutting groove 5 provided on the outer periphery of the cutter body 1.
Since the operation is almost the same as that of the first embodiment, the explanation will be omitted.

Next, a third embodiment of the present invention will be described using FIG. 13. A feature of this embodiment is that knurlings 49 and 50 are formed on the side walls of the cutting groove 5 provided on the outer periphery of the cutter body 1. The knurlings 49 and 50 shape the side surfaces of the tip ends of the pair of electrode rollers 46. About the action 1st
Since this embodiment is almost the same as that of the embodiment, the explanation will be omitted. It goes without saying that the knurlings 49 and 50 can also be applied to the first embodiment and the second embodiment.

(Effects of the invention) As explained in detail above, according to the invention,
The body of the cutter attached to the electrode roller shaping device is formed of a circular member, a cutting groove is provided along the circumferential direction on the outer periphery of the circular cutter body, and the side surface of the tip end of the electrode roller is shaped on the side wall of the cutting groove. Since the cutter is provided with a blade portion for shaping the top of the tip of the electrode roller on the bottom surface of the cutting groove, the cutter is simple in structure, inexpensive to manufacture, and easy to maintain. be able to. Furthermore, since it is attached with a nut, it can be easily attached to and detached from the electrode roller shaping device.

[Brief explanation of the drawing]

Figure 1 is a front view showing one embodiment of the present invention;
The figure is a right side view of the thing in Figure 1, Figure 3 is a sectional view taken along the - line in Figure 1, Figure 4 is a front view of the electrode roller shaping device, and Figure 5 is a right side view of the thing in Figure 4. , FIG. 6 is a plan view of the one in FIG. 4, FIG. 7 is a cross-sectional view taken along - in FIG. 6, FIG. 8 is a cross-sectional view taken along - in FIG. 10 is a sectional view taken along - in FIG. 9; FIG. 11 is a front view showing the third embodiment of the present invention; FIG. 12 is taken along line XII-XII in FIG. 11. The sectional view and FIG. 13 are front views showing a fourth embodiment of the present invention. 1A, 1B...Katsuta, 1...Katsuta body, 5
... Cutting groove, 6 ... Cutting blade, 7 ... Cutting blade, 8,
47, 48... Long cutting blade, 9... Electrode roller shaping device, 45... Roll spot welding machine, 46
...A pair of electrode rollers.

Claims (1)

[Scope of utility model registration request] In an electrode roller shaping cutter that is attached to an electrode roller shaping device for shaping a pair of electrode rollers of a roll spot welding machine, the cutter body of the electrode roller shaping cutter is formed of a circular member, and a circumference is attached to the outer periphery of the circular cutter body. Cutting grooves along the direction are provided,
A blade portion for shaping the side surfaces of the tip ends of the pair of electrode rollers is provided on the side wall portion of the cutting groove, and a blade portion for shaping the top portions of the tip portions of the pair of electrode rollers is provided on the bottom surface portion of the cutting groove. An electrode roller shaping cutter featuring: